This manual covers the 1987 Yamaha QT50, also known as the QT50M. This lightweight scooter was designed for urban commuting and recreational use, emphasizing simplicity, reliability, and fuel efficiency. Its characteristic Yamaha build quality made it a competitive option in the entry-level scooter market of the late 1980s, appealing to young riders and those seeking economical transportation. The QT50 features a 49 cc two-stroke, air-cooled engine, an automatic V-belt transmission, and drum brakes, all housed within a compact and user-friendly design.

This Repair Service Manual provides comprehensive guidance for maintaining and repairing the 1987 Yamaha QT50. It details procedures for the engine, transmission, fuel system, electrical system, braking system, suspension, and chassis. The manual includes routine maintenance schedules, troubleshooting steps for common issues like carburetor clogging and electrical faults, and instructions for major repairs such as engine rebuilds. Technical specifications, diagnostic capabilities, and information on required special tools are also covered, making it an essential resource for owners, mechanics, and technicians.